DistroKid offers multiple plans, ranging from a single artist/band plan, to Ultimate plans for up to 100 artists.
To see what subscriptions for Musicians and Labels DistroKid offers, you can sign up or sign in and visit https://distrokid.com/plan.
For existing users, if you ever need more slots or features, you can always upgrade your subscription from your dashboard as well.
For information about DistroKid's optional Album Extras, please check out the FAQ article here.
DistroKid also offers a ton of (mostly free! 
) tools & services that we think you'll love!
To see all the awesome tools you can use, sign in to DistroKid and click on the DistroKid Features menu and then scroll to the Goodies section - and read more here.